/* * The CPU has been marked offline. Migrate IRQs off this CPU. If * the affinity settings do not allow other CPUs, force them onto any * available CPU. */ void migrate_irqs(void) { unsigned int i, cpu = smp_processor_id(); struct irq_desc *desc; unsigned long flags; local_irq_save(flags); for_each_irq_desc(i, desc) { struct irq_data *d = &desc->irq_data; bool affinity_broken = false; raw_spin_lock(&desc->lock); do { if (desc->action == NULL) break; if (d->node != cpu) break; affinity_broken = migrate_one_irq(d); } while (0); raw_spin_unlock(&desc->lock); if (affinity_broken && printk_ratelimit()) pr_warning("IRQ%u no longer affine to CPU%u\n", i, cpu); } local_irq_restore(flags); }
/* * The current CPU has been marked offline. Migrate IRQs off this CPU. * If the affinity settings do not allow other CPUs, force them onto any * available CPU. * * Note: we must iterate over all IRQs, whether they have an attached * action structure or not, as we need to get chained interrupts too. */ void migrate_irqs(void) { unsigned int i; struct irq_desc *desc; unsigned long flags; local_irq_save(flags); for_each_irq_desc(i, desc) { bool affinity_broken; raw_spin_lock(&desc->lock); affinity_broken = migrate_one_irq(desc); raw_spin_unlock(&desc->lock); if (affinity_broken) pr_warn_ratelimited("IRQ%u no longer affine to CPU%u\n", i, smp_processor_id()); }
/* * The current CPU has been marked offline. Migrate IRQs off this CPU. * If the affinity settings do not allow other CPUs, force them onto any * available CPU. * * Note: we must iterate over all IRQs, whether they have an attached * action structure or not, as we need to get chained interrupts too. */ void migrate_irqs(void) { unsigned int i; struct irq_desc *desc; unsigned long flags; local_irq_save(flags); for_each_irq_desc(i, desc) { bool affinity_broken; raw_spin_lock(&desc->lock); affinity_broken = migrate_one_irq(desc); raw_spin_unlock(&desc->lock); // delete by guohaijing 20140505 ɾ³ýlog /*if (affinity_broken && printk_ratelimit()) pr_warning("IRQ%u no longer affine to CPU%u\n", i, smp_processor_id());*/ }
/** * irq_migrate_all_off_this_cpu - Migrate irqs away from offline cpu * * The current CPU has been marked offline. Migrate IRQs off this CPU. * If the affinity settings do not allow other CPUs, force them onto any * available CPU. * * Note: we must iterate over all IRQs, whether they have an attached * action structure or not, as we need to get chained interrupts too. */ void irq_migrate_all_off_this_cpu(void) { unsigned int irq; struct irq_desc *desc; unsigned long flags; local_irq_save(flags); for_each_active_irq(irq) { bool affinity_broken; desc = irq_to_desc(irq); raw_spin_lock(&desc->lock); affinity_broken = migrate_one_irq(desc); raw_spin_unlock(&desc->lock); if (affinity_broken) pr_warn_ratelimited("IRQ%u no longer affine to CPU%u\n", irq, smp_processor_id()); } local_irq_restore(flags); }